/Engine/Source/Runtime/Slate/Public/Widgets/Input/NumericTypeInterface.h
Sets the minimum and maximum fractional digits - A minimum greater than 0 will always have that many trailing zeros
void SetMinFractionalDigits ( const [TAttribute](API\Runtime\Core\Misc\TAttribute)< [TOptional](API\Runtime\Core\IO\TOptional)< int32 >> & NewValue )